This component includes all functionality related to JavaScript manipulation of window, document and navigator objects that are available in Navigator 4.x and earlier, and that was never defined by the W3C.

Reporter, please make an example. And consider to read the bug writers
guidelines on Bugzilla. You don't want to have a short reply too do you? Please
make a simple, but functional, example. And attache it to this bug. This would
be a great help for all testers.
Thank you, HJ.

The initial testcase in this bug has two problems, it calls getComputedStyle(e,
null) which is incorrect, the second parameter to the getComputedStyle() should
be a string, so passing in an empty string is what should have been done in the
testcase, passing in null will cause an automatic object to string coversion in
JS which results in the second argument that's passed in being the string "null".
The other problem was that the name of the css property was incorrect, the
testcase used "paddingLeft" when it should've used "padding-left".